Abnormal Micronutrient Intake Is Associated with the Risk of Periodontitis: A Dose–response Association Study Based on NHANES 2009–2014

The association between micronutrient intake and the risk of periodontitis has received much attention in recent years. However, most studies focused on the linear relationship between them. This study aimed to explore the dose–response association between micronutrient intake and periodontitis. A total of 8959 participants who underwent a periodontal examination, and reported their micronutrient intake levels were derived from the US National Health and Nutrition Examination Survey (NHANES, 2009–2014) database. Logistic regression was performed to evaluate associations between micronutrient intake and periodontitis after propensity score matching (PSM), and restricted cubic splines (RCS) analysis was conducted to explore the dose–response associations. Following PSM, 5530 participants were included in the RCS analysis. The risk of periodontitis was reduced with sufficient intake of the following micronutrients: vitamin A, vitamin B1, vitamin B2, and vitamin E. In addition, the risk of periodontitis was increased with excessive intake of the following micronutrients: vitamin B1 (1.8 mg/day, males; 1.3 mg/day, females), vitamin C (90 mg/day, males), and copper (1.1 mg/day, combined). In conclusion, a linear association was found between vitamin A, vitamin B2, vitamin C, and copper and periodontitis—namely, a sufficient intake of vitamin A and vitamin B2 might help reduce the prevalence of periodontitis; by contrast, a high intake of vitamin C and copper increased the risk. In addition, a nonlinear dose–response association was found for the incidence of periodontitis with vitamin B1 and vitamin E. When within reasonable limits, supplemental intake helped reduce the prevalence of periodontitis, while excessive intake did not help significantly and might even increase the risk. However, confounding factors, such as health awareness, should still be considered.     

胫骨平台骨折Schatzker分型与膝关节功能相关性分析

目的：探讨胫骨平台骨折Schatzker分型与术后膝关节功能相关性。方法选取2010年1月至2014年12月收治的胫骨平台骨折患者120例,根据X线片、CT及三维重建进行Schatzker分型,分为6组,对各组术后膝关节功能进行随访并进行统计学分析。结果经Kruskal‐Wallis检验,6组膝关节功能评价优良等级分布比较差异有统计学意义（P＜0．01）,进一步两两比较,1、2组分别与4、5、6组比较,差异有统计学意义（P＜0．05）。结论胫骨平台骨折Schatzker分型与术后膝关节功能密切相关,Ⅳ、Ⅴ、Ⅵ型骨折术后膝关节功能评分明显较差。     

失碳长春碱联合化疗治疗晚期乳腺癌

目的观察以失碳长春碱（Ｎａｖｅｂｉｎｅ）为主的联合化疗治疗晚期乳癌的近期疗效和毒性。方法用失碳长春碱联合阿霉素或５－氟脲嘧啶或顺铂治疗晚期乳癌２０例。结果可评价疗效的１８例中,部分缓解８例,轻微缓解３例,稳定５例,进展２例,无完全缓解病例,有效率４４．４％。化疗后卡氏评分总体评价较化疗前提高（Ｐ＜０．０１）,有显著性差异。毒性反应主要是骨髓抑制、消化道反应、脱发、静脉炎,神经毒性亦可见到,多为轻度,无麻痹性肠梗阻发生。结论含失碳长春碱的联合化疗治疗晚期乳癌有较好疗效,但骨髓毒性亦较重,使用时应谨慎     

Impact of Precursor Concentration on Perovskite Crystallization for Efficient Wide-Bandgap Solar Cells

High-crystalline-quality wide-bandgap metal halide perovskite materials that achieve superior performance in perovskite solar cells (PSCs) have been widely explored. Precursor concentration plays a crucial role in the wide-bandgap perovskite crystallization process. Herein, we investigated the influence of precursor concentration on the morphology, crystallinity, optical property, and defect density of perovskite materials and the photoelectric performance of solar cells. We found that the precursor concentration was the key factor for accurately controlling the nucleation and crystal growth process, which determines the crystallization of perovskite materials. The precursor concentration based on Cs_0.05FA_0.8MA_0.15Pb(I_0.84Br_0.16)₃ perovskite was controlled from 0.8 M to 2.3 M. The perovskite grains grow larger with the increase in concentration, while the grain boundary and bulk defect decrease. After regulation and optimization, the champion PSC with the 2.0 M precursor concentration exhibits a power conversion efficiency (PCE) of 21.13%. The management of precursor concentration provides an effective way for obtaining high-crystalline-quality wide-bandgap perovskite materials and high-performance PSCs.     

Experimental and Numerical Study on Uniaxial Compression Failure of Concrete Confined by Nylon Ties

The developments in the cisvil engineering fields have led to an increased demand for structural reinforcements. Therefore, designing an effective, green, convenient, and low-cost reinforcement method is considerably important. Nylon ties have high strength and good heat resistance, and they can retain good tensile properties after high-temperature cooling. Further, they are inexpensive and can be recycled. Thus, they are considered suitable for structural reinforcement engineering. In this study, the core concrete was reinforced by the active confinement of prestressed nylon ties. A uniaxial compression test was performed to evaluate the reinforcement effect of the preload generated by the high-temperature cooling of the tie rod on the core concrete. The results show that nylon ties can effectively improve the mechanical properties of the core concrete. Combined with numerical simulation technology, a damage model of a confined concrete column (CC) was established, and the damage evolution law of CC under uniaxial axial compression was analyzed. Combined with numerical simulation and experimental research, the effectiveness of nylon tie reinforced concrete and the reliability of the damage model were verified, providing a reference for research on engineering reinforcement.     

三仙信力胶囊对小鼠耐缺氧能力的实验研究

目的:探讨三仙信力胶囊对小鼠耐缺氧能力的影响.方法:对实验小鼠进行耐缺氧等实验观察.结果:三仙信力胶囊对小鼠缺氧等应激耐受性的影响显著,可明显延长实验动物在缺氧情况下的生存时间.结论:三仙信力胶囊具有明显的增强机体耐缺氧能力的作用.     

牙源性角化囊肿的临床与X线诊断（附26例分析）

本文报告了经手术、病理证实的２６例牙源性角化囊肿，着重分析了其临床特点与Ｘ线表现，提出了本病的Ｘ线诊断依据：①单房不含牙的牙源性囊肿，囊内不含死髓牙的根尖者。②多房不含牙的牙源性囊肿，房的大小、形态相似，并有沿颌骨长轴发展趋向者。③单或多房含牙的牙源性囊肿，所含牙齿不具备真正含齿囊肿特点者。④多发性颌骨囊肿，房的大小、形态及部位有对称分布倾向者。     

乳腺癌组织中细胞粘附分子CD15的定量研究

为了探讨细胞粘附分子ＣＤ１５表达及含量与乳腺癌分化程度和淋巴结转移状况的关系,应用微波－ＳＰ法和图像分析技术,对９４例乳腺癌和１０例正常乳腺组织中ＣＤ１５的表达及含量进行检测。结果：ＣＤ１５表达阳性物质在正常乳腺中有很极性地位于腺上皮游高面,而在乳腺癌中主要分布于浆膜;ＣＤ１５表达阳性率和图像定量分析平均光密度值在乳腺癌组织中均显著高于正常乳腺组织,并均随乳腺癌分化程度减低和淋巴结转移而     

Attitudes Towards Bariatric Surgery in the General Public

Background

Prevalence rates of obesity are still rising. Weight loss surgery (WLS) is the most invasive but also most effective treatment option when behavioral modification has failed. Research indicates that health care professionals hold ambivalent views on bariatric surgery, while views of the general public have not yet been investigated.

Methods

In a German representative sample of n?=?3,003 respondents in a computer-assisted telephone interview, n?=?1,008 persons were interviewed on their views of the effectiveness of bariatric surgery and other interventions for obesity. Also, willingness to recommend a treatment was assessed.

Results

Lifestyle-based interventions were viewed as most effective in terms of weight loss. About 50 % of the population stated that WLS is “very effective” while still a quarter of respondents did not ascribe effectiveness to WLS. Higher age was associated with lower expectations of effectiveness while higher stigmatizing attitudes and genetic attributes for obesity were associated with higher expectations of effectiveness. Seventy-two percent would not recommend WLS or undergo it, if applicable, themselves. Higher educated respondents and those that viewed WLS as effective were more likely to recommend WLS.

Conclusions

The German general public seems to be rather cautious regarding bariatric surgery. It may be assumed that false beliefs on the effectiveness and risk patterns of bariatric surgery are still very common, despite rising surgery numbers. Our results further emphasize the need for providing evidence-based information on bariatric surgery to the general public.